Corrections and clarifications.

A story in some editions of the Jan. 13 Tribune reported...

January 14, 1988

A story in some editions of the Jan. 13 Tribune reported incorrectly that part of the proposed superconducting supercollider would be above ground if it is built in Illinois. According to a state official, all of the giant particle accelerator would lie 200 to 400 feet underground although the state would have to acquire 3,640 acres of surface land above parts of the project`s route. The Tribune regrets the error.